At almost precisely the same moment, you send an email to David and text message to Nils. At this time of day (late morning), David is more likely to be near his computer than Nils is by his phone. That said, Nils is German and possesses the sort of promptness one associates with those people. Of note, finally, is this: the message to Nils is of a social nature, while the one to David concerns a more pressing job-related matter.
All these factors considered, how alone do you feel in the world?